prometheus.Handler is deprecated according to the godoc for the package so
instead we're using promhttp.
Additionally, we are exposing the Registry that metrics is using so other
plugins that are not inside of coredns can read the registry. Otherwise, if
we kept using the Default one, there's no way to access that from outside
of the coredns repo since it is vendored.
This fix is an attempt to fix the issue raised #1192.
The issue that a plain `dep -ensure update` fails is because
the incompatibility of ugorji/go with the rest of packages (etcd, k8s etc)
and the incompatibility of client-go vs. apimachinery.
This fix fixed apimachinery and ugorji/go so that it is possible
to use `dep -ensure update`.
Previously updates has to be done individually, e.g.,
`dep -ensure update github.com/coreos/etcd`
This fix fixes#1192.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This fix updates vendor libraries except client-go, apimachinery
and ugorji/go, as github.com/ugorji/go/codec is causing compatibilities issues.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
